1 /* Derived from Applicom driver ac.c for SCO Unix */ 2 /* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */ 3 /* dwmw2@infradead.org 30/8/98 */ 4 /* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */ 5 /* This module is for Linux 2.1 and 2.2 series kernels. */ 6 /*****************************************************************************/ 7 /* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */ 8 /* ceci pour reseter correctement apres une sortie sauvage */ 9 /* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */ 10 /* LoopCount n'etait pas initialise a 0. */ 11 /* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */ 12 /* pour liberer le bus */ 13 /* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */ 14 /* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */ 15 /* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */ 16 /* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */ 17 /* adresses de base des cartes, IOCTL 6 plus complet */ 18 /* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */ 19 /* de code autre que le texte V2.6.1 en V2.8.0 */ 20 /*****************************************************************************/ 21 22 23 #include <linux/kernel.h> 24 #include <linux/module.h> 25 #include <linux/interrupt.h> 26 #include <linux/slab.h> 27 #include <linux/errno.h> 28 #include <linux/miscdevice.h> 29 #include <linux/pci.h> 30 #include <linux/wait.h> 31 #include <linux/init.h> 32 #include <linux/fs.h> 33 34 #include <asm/io.h> 35 #include <asm/uaccess.h> 36 37 #include "applicom.h" 38 39 40 /* NOTE: We use for loops with {write,read}b() instead of 41 memcpy_{from,to}io throughout this driver. This is because 42 the board doesn't correctly handle word accesses - only 43 bytes. 44 */ 45 46 47 #undef DEBUG 48 49 #define MAX_BOARD 8 /* maximum of pc board possible */ 50 #define MAX_ISA_BOARD 4 51 #define LEN_RAM_IO 0x800 52 #define AC_MINOR 157 53 54 #ifndef PCI_VENDOR_ID_APPLICOM 55 #define PCI_VENDOR_ID_APPLICOM 0x1389 56 #define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001 57 #define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002 58 #define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003 59 #endif 60 #define MAX_PCI_DEVICE_NUM 3 61 62 static char *applicom_pci_devnames[] = { 63 "PCI board", 64 "PCI2000IBS / PCI2000CAN", 65 "PCI2000PFB" 66 }; 67 68 static struct pci_device_id applicom_pci_tbl[] = { 69 { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC, 70 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 71 { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN, 72 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 73 { PCI_VENDOR_ID_APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB, 74 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, 75 { 0 } 76 }; 77 MODULE_DEVICE_TABLE(pci, applicom_pci_tbl); 78 79 MODULE_AUTHOR("David Woodhouse & Applicom International"); 80 MODULE_DESCRIPTION("Driver for Applicom Profibus card"); 81 MODULE_LICENSE("GPL"); 82 83 MODULE_SUPPORTED_DEVICE("ac"); 84 85 86 static struct applicom_board { 87 unsigned long PhysIO; 88 void __iomem *RamIO; 89 wait_queue_head_t FlagSleepSend; 90 long irq; 91 spinlock_t mutex; 92 } apbs[MAX_BOARD]; 93 94 static unsigned int irq = 0; /* interrupt number IRQ */ 95 static unsigned long mem = 0; /* physical segment of board */ 96 97 module_param(irq, uint, 0); 98 MODULE_PARM_DESC(irq, "IRQ of the Applicom board"); 99 module_param(mem, ulong, 0); 100 MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board"); 101 102 static unsigned int numboards; /* number of installed boards */ 103 static volatile unsigned char Dummy; 104 static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec); 105 static unsigned int WriteErrorCount; /* number of write error */ 106 static unsigned int ReadErrorCount; /* number of read error */ 107 static unsigned int DeviceErrorCount; /* number of device error */ 108 109 static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *); 110 static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *); 111 static int ac_ioctl(struct inode *, struct file *, unsigned int, 112 unsigned long); 113 static irqreturn_t ac_interrupt(int, void *, struct pt_regs *); 114 115 static struct file_operations ac_fops = { 116 .owner = THIS_MODULE, 117 .llseek = no_llseek, 118 .read = ac_read, 119 .write = ac_write, 120 .ioctl = ac_ioctl, 121 }; 122 123 static struct miscdevice ac_miscdev = { 124 AC_MINOR, 125 "ac", 126 &ac_fops 127 }; 128 129 static int dummy; /* dev_id for request_irq() */ 130 131 static int ac_register_board(unsigned long physloc, void __iomem *loc, 132 unsigned char boardno) 133 { 134 volatile unsigned char byte_reset_it; 135 136 if((readb(loc + CONF_END_TEST) != 0x00) || 137 (readb(loc + CONF_END_TEST + 1) != 0x55) || 138 (readb(loc + CONF_END_TEST + 2) != 0xAA) || 139 (readb(loc + CONF_END_TEST + 3) != 0xFF)) 140 return 0; 141 142 if (!boardno) 143 boardno = readb(loc + NUMCARD_OWNER_TO_PC); 144 145 if (!boardno && boardno > MAX_BOARD) { 146 printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n", 147 boardno, physloc, MAX_BOARD); 148 return 0; 149 } 150 151 if (apbs[boardno - 1].RamIO) { 152 printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n", 153 boardno, physloc, boardno, apbs[boardno-1].PhysIO); 154 return 0; 155 } 156 157 boardno--; 158 159 apbs[boardno].PhysIO = physloc; 160 apbs[boardno].RamIO = loc; 161 init_waitqueue_head(&apbs[boardno].FlagSleepSend); 162 spin_lock_init(&apbs[boardno].mutex); 163 byte_reset_it = readb(loc + RAM_IT_TO_PC); 164 165 numboards++; 166 return boardno + 1; 167 } 168 169 #ifdef MODULE 170 171 #define applicom_init init_module 172 173 void cleanup_module(void) 174 { 175 int i; 176 177 misc_deregister(&ac_miscdev); 178 179 for (i = 0; i < MAX_BOARD; i++) { 180 181 if (!apbs[i].RamIO) 182 continue; 183 184 if (apbs[i].irq) 185 free_irq(apbs[i].irq, &dummy); 186 187 iounmap(apbs[i].RamIO); 188 } 189 } 190 191 #endif /* MODULE */ 192 193 int __init applicom_init(void) 194 { 195 int i, numisa = 0; 196 struct pci_dev *dev = NULL; 197 void __iomem *RamIO; 198 int boardno; 199 200 printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n"); 201 202 /* No mem and irq given - check for a PCI card */ 203 204 while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) { 205 206 if (dev->vendor != PCI_VENDOR_ID_APPLICOM) 207 continue; 208 209 if (dev->device > MAX_PCI_DEVICE_NUM || dev->device == 0) 210 continue; 211 212 if (pci_enable_device(dev)) 213 return -EIO; 214 215 RamIO = ioremap(dev->resource[0].start, LEN_RAM_IO); 216 217 if (!RamIO) { 218 printk(KERN_INFO "ac.o: Failed to ioremap PCI memory space at 0x%lx\n", dev->resource[0].start); 219 pci_disable_device(dev); 220 return -EIO; 221 } 222 223 printk(KERN_INFO "Applicom %s found at mem 0x%lx, irq %d\n", 224 applicom_pci_devnames[dev->device-1], dev->resource[0].start, 225 dev->irq); 226 227 boardno = ac_register_board(dev->resource[0].start, RamIO,0); 228 if (!boardno) { 229 printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n"); 230 iounmap(RamIO); 231 pci_disable_device(dev); 232 continue; 233 } 234 235 if (request_irq(dev->irq, &ac_interrupt, SA_SHIRQ, "Applicom PCI", &dummy)) { 236 printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq); 237 iounmap(RamIO); 238 pci_disable_device(dev); 239 apbs[boardno - 1].RamIO = NULL; 240 continue; 241 } 242 243 /* Enable interrupts. */ 244 245 writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC); 246 247 apbs[boardno - 1].irq = dev->irq; 248 } 249 250 /* Finished with PCI cards. If none registered, 251 * and there was no mem/irq specified, exit */ 252 253 if (!mem || !irq) { 254 if (numboards) 255 goto fin; 256 else { 257 printk(KERN_INFO "ac.o: No PCI boards found.\n"); 258 printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n"); 259 return -ENXIO; 260 } 261 } 262 263 /* Now try the specified ISA cards */ 264 265 for (i = 0; i < MAX_ISA_BOARD; i++) { 266 RamIO = ioremap(mem + (LEN_RAM_IO * i), LEN_RAM_IO); 267 268 if (!RamIO) { 269 printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1); 270 continue; 271 } 272 273 if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i), 274 RamIO,i+1))) { 275 iounmap(RamIO); 276 continue; 277 } 278 279 printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq); 280 281 if (!numisa) { 282 if (request_irq(irq, &ac_interrupt, SA_SHIRQ, "Applicom ISA", &dummy)) { 283 printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq); 284 iounmap(RamIO); 285 apbs[boardno - 1].RamIO = NULL; 286 } 287 else 288 apbs[boardno - 1].irq = irq; 289 } 290 else 291 apbs[boardno - 1].irq = 0; 292 293 numisa++; 294 } 295 296 if (!numisa) 297 printk(KERN_WARNING"ac.o: No valid ISA Applicom boards found at mem 0x%lx\n",mem); 298 299 fin: 300 init_waitqueue_head(&FlagSleepRec); 301 302 WriteErrorCount = 0; 303 ReadErrorCount = 0; 304 DeviceErrorCount = 0; 305 306 if (numboards) { 307 misc_register(&ac_miscdev); 308 for (i = 0; i < MAX_BOARD; i++) { 309 int serial; 310 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 311 312 if (!apbs[i].RamIO) 313 continue; 314 315 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 316 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 317 318 boardname[serial] = 0; 319 320 321 printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d", 322 i+1, boardname, 323 (int)(readb(apbs[i].RamIO + VERS) >> 4), 324 (int)(readb(apbs[i].RamIO + VERS) & 0xF)); 325 326 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 327 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 328 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 329 330 if (serial != 0) 331 printk(" S/N %d\n", serial); 332 else 333 printk("\n"); 334 } 335 return 0; 336 } 337 338 else 339 return -ENXIO; 340 } 341 342 343 #ifndef MODULE 344 __initcall(applicom_init); 345 #endif 346 347 static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) 348 { 349 unsigned int NumCard; /* Board number 1 -> 8 */ 350 unsigned int IndexCard; /* Index board number 0 -> 7 */ 351 unsigned char TicCard; /* Board TIC to send */ 352 unsigned long flags; /* Current priority */ 353 struct st_ram_io st_loc; 354 struct mailbox tmpmailbox; 355 #ifdef DEBUG 356 int c; 357 #endif 358 DECLARE_WAITQUEUE(wait, current); 359 360 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 361 static int warncount = 5; 362 if (warncount) { 363 printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n", 364 count, sizeof(struct st_ram_io) + sizeof(struct mailbox)); 365 warncount--; 366 } 367 return -EINVAL; 368 } 369 370 if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io))) 371 return -EFAULT; 372 373 if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)], 374 sizeof(struct mailbox))) 375 return -EFAULT; 376 377 NumCard = st_loc.num_card; /* board number to send */ 378 TicCard = st_loc.tic_des_from_pc; /* tic number to send */ 379 IndexCard = NumCard - 1; 380 381 if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO) 382 return -EINVAL; 383 384 #ifdef DEBUG 385 printk("Write to applicom card #%d. struct st_ram_io follows:", 386 IndexCard+1); 387 388 for (c = 0; c < sizeof(struct st_ram_io);) { 389 390 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]); 391 392 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 393 printk(" %2.2X", ((unsigned char *) &st_loc)[c]); 394 } 395 } 396 397 printk("\nstruct mailbox follows:"); 398 399 for (c = 0; c < sizeof(struct mailbox);) { 400 printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]); 401 402 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 403 printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]); 404 } 405 } 406 407 printk("\n"); 408 #endif 409 410 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 411 412 /* Test octet ready correct */ 413 if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) { 414 Dummy = readb(apbs[IndexCard].RamIO + VERS); 415 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 416 printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n", 417 IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY)); 418 DeviceErrorCount++; 419 return -EIO; 420 } 421 422 /* Place ourselves on the wait queue */ 423 set_current_state(TASK_INTERRUPTIBLE); 424 add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 425 426 /* Check whether the card is ready for us */ 427 while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) { 428 Dummy = readb(apbs[IndexCard].RamIO + VERS); 429 /* It's busy. Sleep. */ 430 431 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 432 schedule(); 433 if (signal_pending(current)) { 434 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, 435 &wait); 436 return -EINTR; 437 } 438 spin_lock_irqsave(&apbs[IndexCard].mutex, flags); 439 set_current_state(TASK_INTERRUPTIBLE); 440 } 441 442 /* We may not have actually slept */ 443 set_current_state(TASK_RUNNING); 444 remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait); 445 446 writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 447 448 /* Which is best - lock down the pages with rawio and then 449 copy directly, or use bounce buffers? For now we do the latter 450 because it works with 2.2 still */ 451 { 452 unsigned char *from = (unsigned char *) &tmpmailbox; 453 void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC; 454 int c; 455 456 for (c = 0; c < sizeof(struct mailbox); c++) 457 writeb(*(from++), to++); 458 } 459 460 writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC); 461 writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC); 462 writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC); 463 writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 464 writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 465 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 466 Dummy = readb(apbs[IndexCard].RamIO + VERS); 467 spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags); 468 return 0; 469 } 470 471 static int do_ac_read(int IndexCard, char __user *buf, 472 struct st_ram_io *st_loc, struct mailbox *mailbox) 473 { 474 void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC; 475 unsigned char *to = (unsigned char *)&mailbox; 476 #ifdef DEBUG 477 int c; 478 #endif 479 480 st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC); 481 st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 482 483 484 { 485 int c; 486 487 for (c = 0; c < sizeof(struct mailbox); c++) 488 *(to++) = readb(from++); 489 } 490 writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 491 writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC); 492 writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 493 writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC), 494 apbs[IndexCard].RamIO + TIC_ACK_FROM_PC); 495 writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY); 496 writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY); 497 writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 498 Dummy = readb(apbs[IndexCard].RamIO + VERS); 499 500 #ifdef DEBUG 501 printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard); 502 503 for (c = 0; c < sizeof(struct st_ram_io);) { 504 printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]); 505 506 for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) { 507 printk(" %2.2X", ((unsigned char *)st_loc)[c]); 508 } 509 } 510 511 printk("\nstruct mailbox follows:"); 512 513 for (c = 0; c < sizeof(struct mailbox);) { 514 printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]); 515 516 for (c++; c % 8 && c < sizeof(struct mailbox); c++) { 517 printk(" %2.2X", ((unsigned char *)mailbox)[c]); 518 } 519 } 520 printk("\n"); 521 #endif 522 return (sizeof(struct st_ram_io) + sizeof(struct mailbox)); 523 } 524 525 static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr) 526 { 527 unsigned long flags; 528 unsigned int i; 529 unsigned char tmp; 530 int ret = 0; 531 DECLARE_WAITQUEUE(wait, current); 532 #ifdef DEBUG 533 int loopcount=0; 534 #endif 535 /* No need to ratelimit this. Only root can trigger it anyway */ 536 if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) { 537 printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n", 538 count,sizeof(struct st_ram_io) + sizeof(struct mailbox)); 539 return -EINVAL; 540 } 541 542 while(1) { 543 /* Stick ourself on the wait queue */ 544 set_current_state(TASK_INTERRUPTIBLE); 545 add_wait_queue(&FlagSleepRec, &wait); 546 547 /* Scan each board, looking for one which has a packet for us */ 548 for (i=0; i < MAX_BOARD; i++) { 549 if (!apbs[i].RamIO) 550 continue; 551 spin_lock_irqsave(&apbs[i].mutex, flags); 552 553 tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY); 554 555 if (tmp == 2) { 556 struct st_ram_io st_loc; 557 struct mailbox mailbox; 558 559 /* Got a packet for us */ 560 ret = do_ac_read(i, buf, &st_loc, &mailbox); 561 spin_unlock_irqrestore(&apbs[i].mutex, flags); 562 set_current_state(TASK_RUNNING); 563 remove_wait_queue(&FlagSleepRec, &wait); 564 565 if (copy_to_user(buf, &st_loc, sizeof(st_loc))) 566 return -EFAULT; 567 if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox))) 568 return -EFAULT; 569 return tmp; 570 } 571 572 if (tmp > 2) { 573 /* Got an error */ 574 Dummy = readb(apbs[i].RamIO + VERS); 575 576 spin_unlock_irqrestore(&apbs[i].mutex, flags); 577 set_current_state(TASK_RUNNING); 578 remove_wait_queue(&FlagSleepRec, &wait); 579 580 printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n", 581 i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 582 DeviceErrorCount++; 583 return -EIO; 584 } 585 586 /* Nothing for us. Try the next board */ 587 Dummy = readb(apbs[i].RamIO + VERS); 588 spin_unlock_irqrestore(&apbs[i].mutex, flags); 589 590 } /* per board */ 591 592 /* OK - No boards had data for us. Sleep now */ 593 594 schedule(); 595 remove_wait_queue(&FlagSleepRec, &wait); 596 597 if (signal_pending(current)) 598 return -EINTR; 599 600 #ifdef DEBUG 601 if (loopcount++ > 2) { 602 printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount); 603 } 604 #endif 605 } 606 } 607 608 static irqreturn_t ac_interrupt(int vec, void *dev_instance, struct pt_regs *regs) 609 { 610 unsigned int i; 611 unsigned int FlagInt; 612 unsigned int LoopCount; 613 int handled = 0; 614 615 // printk("Applicom interrupt on IRQ %d occurred\n", vec); 616 617 LoopCount = 0; 618 619 do { 620 FlagInt = 0; 621 for (i = 0; i < MAX_BOARD; i++) { 622 623 /* Skip if this board doesn't exist */ 624 if (!apbs[i].RamIO) 625 continue; 626 627 spin_lock(&apbs[i].mutex); 628 629 /* Skip if this board doesn't want attention */ 630 if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) { 631 spin_unlock(&apbs[i].mutex); 632 continue; 633 } 634 635 handled = 1; 636 FlagInt = 1; 637 writeb(0, apbs[i].RamIO + RAM_IT_TO_PC); 638 639 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) { 640 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n", 641 i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY)); 642 DeviceErrorCount++; 643 } 644 645 if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) && 646 (readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) { 647 648 printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n", 649 i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY)); 650 DeviceErrorCount++; 651 } 652 653 if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */ 654 if (waitqueue_active(&FlagSleepRec)) { 655 wake_up_interruptible(&FlagSleepRec); 656 } 657 } 658 659 if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */ 660 if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */ 661 wake_up_interruptible(&apbs[i].FlagSleepSend); 662 } 663 } 664 Dummy = readb(apbs[i].RamIO + VERS); 665 666 if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) { 667 /* There's another int waiting on this card */ 668 spin_unlock(&apbs[i].mutex); 669 i--; 670 } else { 671 spin_unlock(&apbs[i].mutex); 672 } 673 } 674 if (FlagInt) 675 LoopCount = 0; 676 else 677 LoopCount++; 678 } while(LoopCount < 2); 679 return IRQ_RETVAL(handled); 680 } 681 682 683 684 static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 685 686 { /* @ ADG ou ATO selon le cas */ 687 int i; 688 unsigned char IndexCard; 689 void __iomem *pmem; 690 int ret = 0; 691 volatile unsigned char byte_reset_it; 692 struct st_ram_io *adgl; 693 void __user *argp = (void __user *)arg; 694 695 /* In general, the device is only openable by root anyway, so we're not 696 particularly concerned that bogus ioctls can flood the console. */ 697 698 adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL); 699 if (!adgl) 700 return -ENOMEM; 701 702 if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) { 703 kfree(adgl); 704 return -EFAULT; 705 } 706 707 IndexCard = adgl->num_card-1; 708 709 if(cmd != 0 && cmd != 6 && 710 ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) { 711 static int warncount = 10; 712 if (warncount) { 713 printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1); 714 warncount--; 715 } 716 kfree(adgl); 717 return -EINVAL; 718 } 719 720 switch (cmd) { 721 722 case 0: 723 pmem = apbs[IndexCard].RamIO; 724 for (i = 0; i < sizeof(struct st_ram_io); i++) 725 ((unsigned char *)adgl)[i]=readb(pmem++); 726 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 727 ret = -EFAULT; 728 break; 729 case 1: 730 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 731 for (i = 0; i < 4; i++) 732 adgl->conf_end_test[i] = readb(pmem++); 733 for (i = 0; i < 2; i++) 734 adgl->error_code[i] = readb(pmem++); 735 for (i = 0; i < 4; i++) 736 adgl->parameter_error[i] = readb(pmem++); 737 pmem = apbs[IndexCard].RamIO + VERS; 738 adgl->vers = readb(pmem); 739 pmem = apbs[IndexCard].RamIO + TYPE_CARD; 740 for (i = 0; i < 20; i++) 741 adgl->reserv1[i] = readb(pmem++); 742 *(int *)&adgl->reserv1[20] = 743 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) + 744 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) + 745 (readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) ); 746 747 if (copy_to_user(argp, adgl, sizeof(struct st_ram_io))) 748 ret = -EFAULT; 749 break; 750 case 2: 751 pmem = apbs[IndexCard].RamIO + CONF_END_TEST; 752 for (i = 0; i < 10; i++) 753 writeb(0xff, pmem++); 754 writeb(adgl->data_from_pc_ready, 755 apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 756 757 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 758 759 for (i = 0; i < MAX_BOARD; i++) { 760 if (apbs[i].RamIO) { 761 byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC); 762 } 763 } 764 break; 765 case 3: 766 pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC; 767 writeb(adgl->tic_des_from_pc, pmem); 768 break; 769 case 4: 770 pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC; 771 adgl->tic_owner_to_pc = readb(pmem++); 772 adgl->numcard_owner_to_pc = readb(pmem); 773 if (copy_to_user(argp, adgl,sizeof(struct st_ram_io))) 774 ret = -EFAULT; 775 break; 776 case 5: 777 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC); 778 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC); 779 writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC); 780 writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY); 781 writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC); 782 break; 783 case 6: 784 printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n"); 785 printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards); 786 printk(KERN_INFO "Segment of board ........... %X\n", (int) mem); 787 printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq); 788 for (i = 0; i < MAX_BOARD; i++) { 789 int serial; 790 char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1]; 791 792 if (!apbs[i].RamIO) 793 continue; 794 795 for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++) 796 boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial); 797 boardname[serial] = 0; 798 799 printk(KERN_INFO "Prom version board %d ....... V%d.%d %s", 800 i+1, 801 (int)(readb(apbs[IndexCard].RamIO + VERS) >> 4), 802 (int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF), 803 boardname); 804 805 806 serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) + 807 (readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) + 808 (readb(apbs[i].RamIO + SERIAL_NUMBER + 2) ); 809 810 if (serial != 0) 811 printk(" S/N %d\n", serial); 812 else 813 printk("\n"); 814 } 815 if (DeviceErrorCount != 0) 816 printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount); 817 if (ReadErrorCount != 0) 818 printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount); 819 if (WriteErrorCount != 0) 820 printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount); 821 if (waitqueue_active(&FlagSleepRec)) 822 printk(KERN_INFO "Process in read pending\n"); 823 for (i = 0; i < MAX_BOARD; i++) { 824 if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend)) 825 printk(KERN_INFO "Process in write pending board %d\n",i+1); 826 } 827 break; 828 default: 829 printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ; 830 ret = -EINVAL; 831 break; 832 } 833 Dummy = readb(apbs[IndexCard].RamIO + VERS); 834 kfree(adgl); 835 return 0; 836 } 837 838 #ifndef MODULE 839 static int __init applicom_setup(char *str) 840 { 841 int ints[4]; 842 843 (void) get_options(str, 4, ints); 844 845 if (ints[0] > 2) { 846 printk(KERN_WARNING "Too many arguments to 'applicom=', expected mem,irq only.\n"); 847 } 848 849 if (ints[0] < 2) { 850 printk(KERN_INFO"applicom numargs: %d\n", ints[0]); 851 return 0; 852 } 853 854 mem = ints[1]; 855 irq = ints[2]; 856 return 1; 857 } 858 859 __setup("applicom=", applicom_setup); 860 861 #endif /* MODULE */ 862 863